406 -12/15pcs Milling Cutter Router Bit SetIncluded: 1 x 12 15pcs 1 2" or 1 4" Router Bit Set Features: All heat treated blade, with high concentricity Resist torsion and strong High grade carbide blade with sharp cutting, smooth rotation, operating light Tungsten Carbide Tipped Router Bits 1 4" (6. 35mm) Hardened Shank Specifications: 12pcs Material: 45 # carbon steel, YG8 alloy Color: As picture shown Packing: wooden box Shank Diameter: 1 4": 6. 35mm 0. 25 inch Wood Box Size: 1 4": 163 x 133